diff --git a/packages/ui/src/components/checks/checks.tsx b/packages/ui/src/components/checks/checks.tsx
index 82d52525..ad078355 100644
--- a/packages/ui/src/components/checks/checks.tsx
+++ b/packages/ui/src/components/checks/checks.tsx
@@ -72,7 +72,7 @@ export function ChecksNotice({ pull, failed, onFix, onDismiss, className }: Chec
 			</a>
 			<span className="min-w-0 flex-1 truncate text-muted-foreground">
 				{failed.map((check, index) => (
-					<span key={check.url || check.name}>
+					<span key={`${check.name}\0${check.url}`}>
 						{index > 0 && ", "}
 						{check.url
 							? (
diff --git a/packages/ui/src/components/session-details/session-details.tsx b/packages/ui/src/components/session-details/session-details.tsx
index a5718a8b..6b961588 100644
--- a/packages/ui/src/components/session-details/session-details.tsx
+++ b/packages/ui/src/components/session-details/session-details.tsx
@@ -188,13 +188,15 @@ function Checks({ checks, summary: [Icon, color, label] }: {
 							</>
 						);
 						const name = `${check.name}: ${check.state}`;
+						// GitHub can list several checks under one URL, such as codecov/patch and codecov/project.
+						const key = `${check.name}\0${check.url}`;
 						return check.url
 							? (
-								<External key={check.url} href={check.url} label={name}>
+								<External key={key} href={check.url} label={name}>
 									{content}
 								</External>
 							)
-							: <div key={check.name} className={ROW} aria-label={name}>{content}</div>;
+							: <div key={key} className={ROW} aria-label={name}>{content}</div>;
 					})}
 				</div>
 			)}